Propriedades energéticas da madeira e do carvão vegetal de cenostigma macrophyllum: subsídios ao uso sustentável

Abstract

This study aimed to evaluate the quality Cenostigma macrophyllum Tul wood for energetic use and to determine the yields and charcoal properties produced at different carbonization temperatures. Discs with 3 cm of thickness were obtained from stem basal positions, 25%, 50%, 75% and 100% of commercial height. The discs were split in two parts. One was used to determine wood properties and the other was carbonized at final temperatures of 400 ºC, 500 ºC and 600 ºC for bio-reducer evaluation . Basic density (1.2 g cm-3), lignin content (34%), higher calorific value (4,845 cal g-1) and gravimetric yield in charcoal (GYC) at 400 ºC (41.5%) were the highlights. The increase of wood pyrolysis temperature from 400 ºC to 600 ºC resulted in 29.4% increase in fixed carbon content and a reduction of 19% and 63.4%, respectively, in charcoal GYC and volatile matter content. In general, the species presented satisfactory energy production.